使用PowerShell将PDF导入Word时遇类型转换错误求助

错误原因分析 #

你遇到的Cannot convert the "False" value of type "bool" to type "Object"错误，根源是错误地为Word InsertFile方法的输入参数添加了[ref]包装。COM方法中只有输出/双向参数才需要用[ref]传递，而InsertFile的ConfirmConversions、Link、Attachment都是输入参数，直接传递布尔值即可，不需要额外包装。

解决步骤 #

1. 移除不必要的[ref]包装：对InsertFile的布尔参数直接传$false，无需[ref]；
2. 限定处理PDF文件：避免循环中处理非PDF文件引发额外错误；
3. 简化COM方法调用：SaveAs和Close方法的参数也无需[ref]包装，直接传递对应值即可；
4. 增强COM对象清理：确保每次循环后释放$newDoc变量，避免内存泄漏。

修改后的完整代码 #

# Define paths
$folderPath = "my source folder"
$resultPath = "my destination folder"

# Create Word application COM object
$wordApp = New-Object -ComObject Word.Application
$wordApp.Visible = $false  # Set Word to run in the background

# Create FileSystemObject COM object
$fso = New-Object -ComObject Scripting.FileSystemObject

# Get the folder
$folder = $fso.GetFolder($folderPath)

# Loop through only PDF files in the folder
foreach ($file in $folder.Files | Where-Object { $_.Extension -eq ".pdf" }) {
    # Create a new Word document
    $newDoc = $wordApp.Documents.Add()

    # Insert PDF content into the new document (no [ref] needed for input parameters)
    try {
        $newDoc.Range().InsertFile($file.Path, $null, $false, $false, $false)
        
        # Add header text
        $newDoc.Content.InsertBefore("Processed document: " + $file.Name + "`n")

        # Define output path and save as DOCX
        $docName = [System.IO.Path]::Combine($resultPath, ($file.BaseName + "_processed.docx"))
        $newDoc.SaveAs($docName, 16)  # 16 = wdFormatXMLDocument
    }
    catch {
        Write-Error "Failed to process file $($file.Name): $_"
    }
    finally {
        # Close document and release COM object
        if ($newDoc) {
            $newDoc.Close($false)
            [System.Runtime.Interopservices.Marshal]::ReleaseComObject($newDoc) | Out-Null
            $newDoc = $null
        }
    }
}

# Cleanup Word COM object
$wordApp.Quit()
[System.Runtime.Interopservices.Marshal]::ReleaseComObject($wordApp) | Out-Null
$wordApp = $null
$fso = $null

# Force garbage collection to release remaining COM objects
[System.GC]::Collect()
[System.GC]::WaitForPendingFinalizers()

额外注意事项 #

• 确保你的Word版本支持PDF导入（Word 2013及以上通常自带该功能，若缺失需安装Office的PDF组件）；
• 大体积PDF转换可能耗时较长，建议添加进度提示或分批处理；
• 若仍报错，检查PDF文件是否损坏或受保护，这类文件无法通过Word直接插入转换。

内容的提问来源于stack exchange，提问作者CIAndrews